Several people claim to have found an efficient algorithm to factor
large integers. If you want me to look at your algorithm, please first factor
one of the numbers below.
These small challenges are hard enough so that
naive algorithms will not be able to solve them, and easy enough so that
an implementation on a personal computer should be able to solve them
(if the corresponding algorithm is really efficient).
Contrary to what was the case for the
official RSA
challenge, there is no money to win here!